{"version":"1.0","provider_name":"Inter Antiquariaat Mefferdt &amp; De Jonge","provider_url":"https:\/\/inter-antiquariaat.nl\/nl-oud","author_name":"admin","author_url":"https:\/\/inter-antiquariaat.nl\/nl-oud\/author\/admin\/","title":"Stelling Den Helder - Van Meurs naar Plantenga, 1879 - Inter Antiquariaat Mefferdt &amp; De Jonge","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"7wAziWjTv4\"><a href=\"https:\/\/inter-antiquariaat.nl\/nl-oud\/antiek\/niet-gecategoriseerd\/stelling-van-den-helder-1879\/\">Stelling Den Helder &#8211; Van Meurs naar Plantenga, 1879<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/inter-antiquariaat.nl\/nl-oud\/antiek\/niet-gecategoriseerd\/stelling-van-den-helder-1879\/embed\/#?secret=7wAziWjTv4\" width=\"600\" height=\"338\" title=\"&#8220;Stelling Den Helder &#8211; Van Meurs naar Plantenga, 1879&#8221; &#8212; Inter Antiquariaat Mefferdt &amp; De Jonge\" data-secret=\"7wAziWjTv4\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/inter-antiquariaat.nl\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"\u201cStelling van Den Helder\u201d, steendruk vervaardigd door M. van Meurs naar ontwerp van M.H.J. Plantenga, gedrukt in 1879 door A.J. Bogaerts in opdracht van de Koninklijke Militaire Academie te Breda. Later met de hand gekleurd. Afm. 53,5 \u00d7 64,6 cm. De Stelling van Den Helder was een samenhangend stelsel van verdedigingswerken ter bescherming van de [...]"}